Definition of hoolock in English:

noun

Information is so scanty regarding the hoolock gibbon (found in Yunnan, Myanmar, Bangladesh and Assam) and the white-cheeked gibbon (found in Yunnan, Laos and Vietnam) that their conservation status is not even defined.

For a strictly arboreal species like the hoolock gibbon, a gap in the canopy is like a roadblock.

The world of the hoolock gibbons in the Borajan reserve forest in Assam is dying, thanks to illegal tree-felling.